MetalBear Blog
metalbear.co · Company blog · on HN since 2022
Company blog of MetalBear, makers of mirrord, on Rust, hooking libc calls, Kubernetes operators and cloud development workflows.
What HN saysHN links it mainly for mirrord's internals, such as hooking libc functions in Rust, and for explaining how it speeds up development against remote Kubernetes environments.
16HN people shared it
4linked it in comments
30stories submitted
417story points
1 year agolast shared
2022people per year2026
Most-shared posts
- 1Hooking Go from Rust6 people · 179 points · first shared 2022 · 32 comments on HN
- 2Mirrord: Intercepting Libc Calls in Rust3 people · 7 points · first shared 2022 · discussion on HN
- 3Mirrord 3.0 – Mirror a pod's network traffic and file system accesses locally2 people · 39 points · first shared 2022 · 3 comments on HN
- 4Writing a Kubernetes Operator2 people · 37 points · first shared 2023 · 1 comments on HN
- 5Approaches in Cloud Development Ergonomics2 people · 19 points · first shared 2022 · discussion on HN
- 6Carcinisation of mirrord (why we use Rust)2 people · 11 points · first shared 2022 · discussion on HN
- 7Fun with macOS's Sip2 people · 3 points · first shared 2023 · discussion on HN
- 8(Re)Introducing mirrord (bridge your local process to remote K8s)2 people · 1 points · first shared 2022 · discussion on HN
- 9Getting Started with Ephemeral Containers1 people · 41 points · first shared 2022 · 5 comments on HN
- 10On Pausing Containers – how we built, and why we deprecated, our container paus1 people · 28 points · first shared 2024 · 5 comments on HN
- 11Ship Code to Kubernetes in Seconds: How mirrord kills 30-min CI Loops1 people · 10 points · first shared 2025 · discussion on HN
- 12Port forwarding between your local machine and Kubernetes1 people · 9 points · first shared 2024 · discussion on HN
- 13Scaling Out Development Environments1 people · 8 points · first shared 2024 · discussion on HN
- 14Inspecting Service Traffic with mirrord dump1 people · 6 points · first shared 2025 · discussion on HN
- 15Gems from Kubernetes 1.33 Release1 people · 5 points · first shared 2025 · discussion on HN
What HN people wrote when they linked it
defaultpwd · 2023-04-18
There is also https://metalbear.co/blog/writing-a-kubernetes-operator/
aviramha · 2023-01-26
mirrord is a tool for backend engineers that enables them to work on a remote environment without needing to deploy there or actually run there.
It makes the iteration time (code -> test -> [review] -> deploy) faster since you don't replace the remote service also, which means many devs can work the same time.
You can read more about it here https://metalbear.co/blog/mirrord-3.0-is-out/
infiniteregrets · 2022-08-26
Hey, seems like node uses libuv and in fact we did a blogpost on it!
https://metalbear.co/blog/mirrord-internals-hooking-libc-functions-in-…
eyalbukchin · 2022-06-06
So there are a bunch of use cases, but the main one we think is during day to day development. mirrord can give you access to “cloud conditions” while you code, without having to go through CI and actually deploying, which a. makes your feedback loops a lot tighter and b. reduces the likelihood you’ll deploy something broken to the cloud (i.e. staging/production) environment and break it for other developers in the organization.
We wrote about it a bit more here if you’re interested: https://metalbear.co/blog/reintroducing-mirrord/